All Day Slimming Tea review: ingredients, price, side effects and our verdict

What is All Day Slimming Tea?

All Day Slimming Tea is a two-part herbal tea program sold by All Slimming Herbs. Each month’s supply is two resealable pouches of 30 tea bags: a “Morning Energy Tea” and an “Evening Detox Tea.” The brand describes it as a “delicious 100% natural tea” for weight loss, detox, digestion and better sleep, based on a traditional recipe from the Nicoya peninsula in Costa Rica. It is sold through the brand’s website with ClickBank as the retailer.

The sales page lists the herbs in each blend but gives no amounts. The Morning Energy Tea contains green tea, oolong tea, orange peel, lemongrass, ginger, dandelion leaf, ginseng root, Garcinia cambogia, monk fruit, natural mint and lemon flavor. The Evening Detox Tea contains senna leaves, licorice root, peppermint leaves, fennel fruit, orange peel, cinnamon bark, dandelion leaves, lemongrass, ginger, monk fruit and natural honey and lemon flavor. We could not find a Supplement Facts or ingredient panel showing how much of each herb is in a tea bag, so we rate dose disclosure as none.

How All Day Slimming Tea claims to work

The brand says the morning tea will “increase your metabolism and energy level, reduce your cravings and appetite, even reduce fat production and fat storage,” so “you can lose weight naturally while enjoying all the foods you love.” The evening tea is said to “reduce constipation, cravings, appetite and bloating,” support detoxification and help you sleep. The page states that more than 18,761 people have reached their ideal weight and that “some have lost over 100 pounds,” and its FAQ says the tea “is proven to support healthy weight loss.”

We found no published study of this tea. The reference list on the sales page mixes a few real studies, many of them on ingredients the tea does not contain (such as berberine, chromium and Gynostemma), with health blogs, a news aggregator and a student e-portfolio page whose title claims a Stanford discovery about garcinia and ginseng. The refund policy page goes further, telling customers the tea “has been scientifically tested, so if you drink it, IT WILL WORK,” and urging people who have not lost weight after 29 days to keep going. These are marketing statements, not evidence.

What the ingredients actually do

Senna: the “detox” in the evening tea

Senna is a stimulant laxative. LiverTox notes that senna is “included in several herbal teas, used for purging and in weight loss,” and that it is recommended for short-term use only, less than one week. Its side effects include cramps and electrolyte imbalance, and long-term use or misuse can lead to a “cathartic colon,” with rare cases of liver injury after months of high-dose use (LiverTox: Senna). Senna does work for constipation in the short term: in a 28-day trial, 69% of people with chronic constipation improved on senna compared with 12% on placebo (Morishita et al., 2021). But this tea is meant to be drunk every evening for three to six months, and any weight it removes is mostly stool and water, not fat. Learn more on our senna page.

Green tea and oolong tea

Both come from the same plant and supply caffeine and catechins. NCCIH says these “may have a modest effect on body weight,” with results that vary by product and activity level (NCCIH: Green Tea). In a small calorimeter study, full-strength oolong tea raised energy expenditure by about 3% over water, an effect similar to the same amount of caffeine alone (Rumpler et al., 2001). That study used tea brewed from 15 grams of leaves a day, far more than one tea bag. See our new oolong tea page and our green tea page.

Garcinia cambogia

Garcinia’s hydroxycitric acid is the main “fat-blocking” claim. In a 12-week JAMA trial, 1,500 mg a day of hydroxycitric acid produced no more weight loss than placebo (Heymsfield et al., 1998), and a meta-analysis found an average extra loss of under 1 kg, with uncertain clinical relevance (Onakpoya et al., 2011). LiverTox rates garcinia a likely rare cause of liver injury, including severe cases (LiverTox: Garcinia Cambogia). More on our garcinia page.

Licorice, ginseng and the rest

The evening tea lists licorice root without saying it is deglycyrrhizinated. Regular licorice contains glycyrrhizin, which NCCIH warns can cause serious problems such as irregular heartbeat, especially with large or long-term intake or in people with high blood pressure or heart or kidney disease (NCCIH: Licorice Root). Both licorice and senna can lower potassium, so the combination deserves caution. The “ginseng root” is not identified by species; Asian ginseng has mixed evidence for fatigue and none for weight loss (NCCIH: Asian Ginseng). Ginger may help nausea (NCCIH: Ginger), and peppermint, fennel, cinnamon and dandelion are reasonable flavor and comfort herbs with little evidence for weight loss (NCCIH: Cinnamon, NCCIH: Dandelion).

Who it may suit, and who should skip it

The morning tea alone may suit a tea drinker who wants a caffeinated, flavored green and oolong blend, as long as they treat any effect on weight as small. The evening tea is harder to recommend for daily use because of senna and full-strength licorice. If you have hit a stall, our guides to weight loss plateaus and liver-healthy weight management cover approaches with better evidence, such as protein and fiber at meals, strength training and sleep.

Skip this tea, or talk with your doctor first, if you are pregnant, breastfeeding or under 18; have high blood pressure, heart rhythm problems, kidney or liver disease, inflammatory bowel disease or a history of disordered eating; or take diuretics, digoxin, corticosteroids, blood thinners, diabetes medication, stimulant medications or antidepressants (garcinia has been linked to rare serotonin-related reactions). People sensitive to caffeine should avoid the morning tea late in the day. If you have ongoing constipation, see our guide to sluggish, irregular bowel movements rather than relying on a nightly laxative tea.

Price, guarantee and where to buy

All Day Slimming Tea is sold through the official All Slimming Herbs website. At the time of our review there was no single-month option. A two-month supply cost $159 ($79 per month) plus shipping, three months cost $207 ($69 per month) and six months cost $294 ($49 per month), with bonus digital guides on the larger packages. The brand also says it is made in the USA in an FDA-registered facility that follows GMP guidelines and was tested in independent labs, but no test results are posted. The guarantee is 60 days, and the sales page notes it is “minus our shipping cost.” Since the brand itself recommends drinking the tea for at least two months, the smallest package uses up most of the refund window.

Our verdict

All Day Slimming Tea pairs a caffeinated morning blend with a senna-based evening “detox” tea, discloses no amounts, and backs dramatic weight loss claims with testimonials and a reference list that is largely unrelated or unreliable. Senna and full-strength licorice are not good choices for months of nightly use, and garcinia carries a rare liver risk with little benefit. We rate it 2.1 out of 5. For better-supported options, see our best weight management supplements guide and our weight management hub.